CN102747725B - Bored pile construction method with tiny disturbance - Google Patents

Bored pile construction method with tiny disturbance Download PDF

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Publication number
CN102747725B
CN102747725B CN201210242665.4A CN201210242665A CN102747725B CN 102747725 B CN102747725 B CN 102747725B CN 201210242665 A CN201210242665 A CN 201210242665A CN 102747725 B CN102747725 B CN 102747725B
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China
Prior art keywords
steel sleeve
construction
bored pile
tunnel
hole
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CN201210242665.4A
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CN102747725A (en
Inventor
杨钱峰
王志刚
黄耀东
向科
黄大维
汤明方
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China Railway 24th Bureau Group Co Ltd
China Railway 24th Bureau Group Shanghai Railway Co Ltd
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China Railway 24th Bureau Group Co Ltd
China Railway 24th Bureau Group Shanghai Railway Co Ltd
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Abstract

The invention belongs to ground foundation engineering field and particularly relates to a bored pile construction method with tiny disturbance, which aims to eliminate the influences to a nearby existing subway tunnel caused by conventional bored pile construction methods. The bored pile construction method particularly comprises the following steps of: firstly carrying out hardening treatment to the ground of the construction site; secondly, conducting spinning preparation to a steel sleeve and positioning a boring center; thirdly, spinning the steel sleeve into the earth and fixing the steel sleeve with the ground; fourthly taking out the soil and forming a hole through a manner of slurry-supported positive cycle; and fifthly, cleaning the hole, lifting a steel reinforcement cage into the hole and pouring concrete. The bored pile construction method has the advantages that in the construction process of a bored pile, only tiny disturbance is produced to the nearby existing subway tunnel, and the displacement and the convergence deformation of the subway tunnel can be guaranteed to be controlled within 10mm. Therefore, the bored pile construction method satisfies the requirements of the subway protection provisions, the construction efficiency is high and the construction cost is lower.

Description

The moving construction method of a kind of bored pile perturbation
Technical field
The invention belongs to ground foundation engineering field, be specifically related to a kind of for the moving construction method of the in-plant bored pile perturbation of existing tunnel.
Background technology
Conventional holing with slurry wall protection construction process of bored concrete pile flow process is: and auger is in place → and mud → continuations of boring → note bore the dig → deslagging → hole → install reinforcing cage → jetting clear end → concreting → pitching pile top reinforcing bar clearly, this kind of construction technology in pore forming process due to hole wall surrounding soil stress release, soil body compare Yi Xiangkong center is subjected to displacement, even there is hole wall collapse or undergauge, in the time constructing near existing subway tunnel, must cause the displacement and deformation that subway tunnel is larger, have a strong impact on the security of operation of train, and bring difficulty to the maintenance of metro maintenance in later stage.
For hole wall collapse or undergauge do not occur, when bored pile construction, can adopt steel sleeve to carry out retaining wall, in the hole forming method of existing bored pile employing steel sleeve retaining wall, there is shellfish promise secret service method, revolve and dig sleeve pipe engineering method and double power head sleeve pipe long screw auger engineering method.Shellfish promise secret service method is dug sleeve pipe engineering method and is adopted percussion and grabbing method to take out the soil body in sleeve pipe with revolving, impact force for punching grab bucket in the time that existing subway tunnel is closely constructed affects greatly existing subway tunnel, can not reach the moving object of perturbation, simultaneously existing tunnel is caused to Secondary Disturbance when preventing that sleeve pipe from extracting, steel sleeve is no longer extracted in principle, adopt above 2 kinds of engineering methods in the time that sleeve pipe is not extracted, construction cost is very high; The steel sleeve of double power head sleeve pipe long screw auger engineering method and the matching of long screw auger require high, and in the time that steel sleeve is not extracted, the more front 2 kinds of engineering methods of cost are higher, and the design of stake footpath is dumb; The steel sleeve follow-up degree of depth of above 3 kinds of engineering methods is identical with the depth of pore forming of bored pile, and the economy of construction is very poor.Following table is the contrast of each construction method.
Therefore those skilled in the art is badly in need of a kind of construction method, can reduce the impact on existing subway tunnel, the efficiency of construction that improves bored pile and reduction construction cost.
Summary of the invention
Technical problem to be solved by this invention is to eliminate existing bored pile construction method for the closely efficiency of construction of impact, reduction construction cost and the raising bored pile of existing subway tunnel of 1-5m of being separated by, now provide a kind of bored pile perturbation to move construction method, carry out bored pile construction by a steel sleeve spinning being buried to the following soil body of existing tunnel closely, reach the micro-disturbing influence for close tunnel with this.
Object of the present invention realizes and being completed by following technical scheme:
The moving construction method of a kind of bored pile perturbation, this construction method is closely located the construction of bored pile for tunnel, it is characterized in that described method at least comprises the steps: first cure process to be carried out in ground, job site, make steel sleeve spinning and prepare and carry out drill center location; Thereafter the just described disposable spinning of steel sleeve puts in place to the following soil body of described tunnel bottom; Adopt afterwards mud off direct circulation engineering method by described steel sleeve and the soil body of following part take out and carry out pore-forming, and carry out hole operation clearly; Finally described reinforcing cage is arranged to the following part of steel sleeve in described hole, and carries out concrete perfusion.
The distance that described steel sleeve bottom exceeds below described tunnel bottom is not more than 3m.
After described steel sleeve spinning puts in place, fix by being arranged on name a person for a particular job described steel sleeve and ground, described job site of fixed support on steel sleeve.
By on the lateral surface of described steel sleeve, be symmetrical arranged rod iron or outside projection form described fixed support point.
Advantage of the present invention is; when bored pile construction, only produce micro-disturbing influence for existing subway tunnel closely; displacement and the convergent deformation that can ensure subway tunnel are controlled in 10mm, meet the requirement of subway protection regulation, and efficiency of construction is high and construction cost is lower.
Brief description of the drawings
Fig. 1 is the moving construction method flow chart of bored pile perturbation of the present invention;
Fig. 2 is the steel sleeve spinning of the present invention schematic diagram that buries;
Fig. 3 is the fixing schematic diagram in steel sleeve of the present invention and ground;
Fig. 4 is mud off direct circulation engineering method of the present invention soil taking hole forming schematic diagram in steel sleeve;
Fig. 5 is filling concrete schematic diagram of the present invention;
Fig. 6 is the structural representation after filling concrete of the present invention completes.
Detailed description of the invention
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
In accompanying drawing 1-6, label 1-7 representative is sleeve pipe spinning machinery 1, steel sleeve 2, fastening devices 3, mud 4, reinforcing cage 5, tunnel 6, concrete seven.
Embodiment: the present embodiment is taking newly-built Shanghai-Hangzhou Engineering of Railway Passenger as example, this Line for Passenger Transportation DK5+250-DK5+450 section is passed through from running tunnel top, station~nine booth station, Shanghai Rail Transit Line 9 Zhongcun Road, the enforcement that adopts stake plate-girder form to cross over tunnel scheme when design, the form of its king-pile is bored pile.
In practice of construction, the distance at the tunnel place that the steel sleeve 2 described in the present invention is 6m near diameter is only 1.5m, adopts in theory this method minimum range can reach 1m.
As shown in Figure 1, the moving construction method of bored pile perturbation of the present invention specifically comprises the steps:
1. hardened ground: before construction, the original ground of job site is carried out to the cure process of plain concrete.
2. preparation of construction: as shown in Figure 2, sleeve pipe spinning machinery 1 is transported to job site location placement, will be placed on sleeve pipe spinning machinery 1 at the steel sleeve 2 of factory's customization simultaneously, and complete the matching location, center of steel sleeve 2 and boring.
3. the spinning of steel sleeve buries with fixing: as shown in Figure 2,3, start sleeve pipe spinning machinery 1, the following certain distance of bottom water plane by disposable steel sleeve 2 spinning to tunnel 6, wherein to exceed the distance below tunnel 6 bottom water planes be tunnel diameter in the bottom of steel sleeve 2 1/4th, to guarantee, in boring procedure, tunnel 6 is only produced to micro-disturbing influence.After the spinning that completes steel sleeve 2 buries, for preventing the downward landing of steel sleeve 2 after pore-forming, by fastening devices 3, steel sleeve 2 and ground, job site are fixed, afterwards sleeve pipe spinning machinery 1 is moved apart to job site.Wherein said fastening devices 3 can be specifically two rod irons that are fixed on steel sleeve 2 outsides, also can be the evagination blooms of two block weldings in steel sleeve 2 outsides, 3 of fastening devicess need contact with ground, job site acquisition stress point and get final product supporting steel sleeve pipe 2 in case fall.
4. soil taking hole forming: as shown in Figure 4, adopt at the construction field (site) mud off direct circulation engineering method that the soil body of interior steel sleeve 2 and following part is taken out and carries out pore-forming, wherein mud 4 is to inject in the time of brill excavator body.Mud off direct circulation engineering method belongs to the technology of commonly seeing in the industry, therefore its concrete steps do not repeat them here.
5. clear hole, reinforcing cage are laid and filling concrete: as shown in Figure 4,5, 6, first hole in previous step is carried out to hole operation clearly; Reinforcing cage 5 is hung in the following hole body part of steel sleeve 2 afterwards, wherein the diameter of reinforcing cage 5 is less than the diameter of steel sleeve; Finally described pore-forming is carried out to concrete perfusion.
The present invention is applicable to the existing subway tunnel low coverage bored pile construction of soft clay area; in the time of bored pile construction, can effectively reduce the impact on existing subway tunnel; displacement and the convergent deformation that can ensure subway tunnel are controlled in 10mm; meet the requirement of subway protection regulation; wherein steel sleeve 2 is not finally extracted, and avoids, in withdrawal process, tunnel 6 is caused to Secondary Disturbance.

Claims (4)

1. the moving construction method of bored pile perturbation, this construction method is closely located the construction of bored pile for tunnel, it is characterized in that described method at least comprises the steps: first cure process to be carried out in ground, job site, make steel sleeve spinning and prepare and carry out drill center location; Described steel sleeve disposable spinning put to the described tunnel bottom following soil body thereafter; Adopt afterwards mud off direct circulation engineering method by steel sleeve and the soil body of following part take out and carry out pore-forming, and carry out hole operation clearly; Finally reinforcing cage is arranged to the following part of steel sleeve in hole, and carries out concrete perfusion.
2. the moving construction method of a kind of bored pile perturbation as claimed in claim 1, is characterized in that the distance that described steel sleeve bottom exceeds below described tunnel bottom is not more than 3m.
3. the moving construction method of a kind of bored pile perturbation as claimed in claim 1, is characterized in that when described steel sleeve spinning puts in place after, fixes by being arranged on fixed support on steel sleeve steel sleeve and the ground, described job site described in naming a person for a particular job.
4. the moving construction method of a kind of bored pile perturbation as claimed in claim 3, is characterized in that by be symmetrical arranged rod iron or the outer projection fixed support point described in forming on the lateral surface of described steel sleeve.
CN201210242665.4A 2012-07-13 2012-07-13 Bored pile construction method with tiny disturbance Active CN102747725B (en)

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CN102747725B true CN102747725B (en) 2014-12-03

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103205963A (en) * 2013-03-14 2013-07-17 同济大学 Construction method of partly recyclable steel sleeve cast-in-situ bored pile
CN107165058B (en) * 2017-05-08 2019-05-21 中铁上海设计院集团有限公司 One kind being used for existing operation Bridge pier reinforcement means

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000336646A (en) * 1999-06-02 2000-12-05 Taiyo Kiso Kk Pile driving method
RU2270899C2 (en) * 2004-04-22 2006-02-27 Общество с ограниченной ответственностью "Магнит" Method and device for concrete mix treatment during bored pile erection
CN101899831A (en) * 2010-08-26 2010-12-01 姚攀峰 Active variable-stiffness leveling pile and construction method thereof
CN101761072B (en) * 2008-12-24 2011-11-09 上海市基础工程有限公司 Construction process for bored pile close to flood wall through riprap layer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000336646A (en) * 1999-06-02 2000-12-05 Taiyo Kiso Kk Pile driving method
RU2270899C2 (en) * 2004-04-22 2006-02-27 Общество с ограниченной ответственностью "Магнит" Method and device for concrete mix treatment during bored pile erection
CN101761072B (en) * 2008-12-24 2011-11-09 上海市基础工程有限公司 Construction process for bored pile close to flood wall through riprap layer
CN101899831A (en) * 2010-08-26 2010-12-01 姚攀峰 Active variable-stiffness leveling pile and construction method thereof

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